Effect of growth temperature on Curie temperature of magnetic ultrathin films Co/Cu(100)

C. C. Kuo, Wen-Chin Lin, C. L. Chiu, H. L. Huang, Minn Tsong Lin*

*此作品的通信作者

研究成果: 雜誌貢獻會議論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

The magnetic and structural properties were investigated for the 2 ML Co/Cu(100) films grown at various temperatures from 125 to 350 K. By precisely controlling the film thickness, the influence of thickness on Curie temperature (TC) due to the finite size effect can be excluded. The Curie temperature of the 2 ML Co keeps almost invariant for the growth temperature (Tg) below 250 K, and drops drastically at Tg, higher than 275 K. For Tg = 340 K, TC dropped to 170 K which is only about half of 325 K for Tg = 125 K. Accompanied with the increase of TC for the films grown at lower temperatures, the remanent Kerr signal as well as coercivity were enhanced. According to a simple theoretical estimation, the change of TC due to the variation of the magnetization and anisotropy was found to be consistent with the experimental results. The enhancement in TC or magnetization and anisotropy with various Tg should be traced back to the presence of island growth in the films grown at lower temperatures.

原文英語
頁(從 - 到)7153-7155
頁數3
期刊Journal of Applied Physics
89
發行號11 II
DOIs
出版狀態已發佈 - 2001 六月 1
事件8th Joint Magnetism and Magnetic Materials-Intermag Conference - San Antonio, TX, 美国
持續時間: 2001 一月 72001 一月 11

ASJC Scopus subject areas

  • 物理與天文學 (全部)

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